In the Season 1 finale, Claire visits the tomb where Adam and Ben were kept; Jane plots a getaway while Nina closes in on Doug's location; Agent Clements' time is running out; Hank faces his inner demons; and a phone call shatters Ben's world.
Willa tells Claire an awful secret just as the election results are announced; Agent Clements tries to convince Jane to free him; Ben shares shocking news with Willa; Bridey contemplates using the dirt she's dug up on Warrens to make the front page; Nina strives to get Doug to confess. Meanwhile, flashbacks chronicle Hank's fall to social pariah.
Hank believes he has evidence that could solve Adam's case and also make him a hero; Willa makes a discovery about what really happened to Adam; Jane turns to an unlikely source for help when she goes into labor; Bridey betrays Willa; and Nina receives a surprising visit.
Det. Meyer watches Adam's therapy sessions; Claire tries to keep an eye on Ben after Hank's dressing-down; the family prepares to support Claire at the gubernatorial debate; and Hank's guest leads him to discover proof of who kidnapped Adam. In other events, Meyer worries about her missing partner; and Ben is visited by someone from his past.
Claire deals with the ramifications of Willa's scheming; Nina tracks Adam, who disappears every night from his home; Clements investigates Jane's link to the pock-marked man; the governor's wife threatens to reveal Claire's drinking; and Hank makes a discovery about Adam's kidnapping.
Flashbacks show Adam's return to Red Pines set against the backdrop of Willa's secrets and lies; what Adam went through in captivity; and Hank's state of mind while incarcerated. In other events, John drops a bombshell on Claire, which forces her to make a difficult decision about the future of her family.
Nina and Clements devise a plan to nab the pock-marked man; and a sick Adam is taken to hospital, where the doctor drops a bombshell on Claire. Meanwhile, Doug has many near-misses with the Warrens and police on the night of Adam's disappearance.
Hank is attacked and names a Warren as the prime suspect; Bridey learns the results of the paternity test she ran on Adam; and Adam receives postcards from the pock-marked man. In other events, in the past, John's grief leads to his affair with Nina.
Meyer and Clements hunt a child kidnapper whose M.O. is similar to Adam's abductor; and Bridey arouses Willa's suspicions while seeking information on Adam. In the past, Claire pushes Hank to share more about Adam's kidnapping and makes a painful discovery about John.
An FBI agent joins the investigation; Adam returns to the bunker in an attempt to jog his memory; Willa questions Claire's motives; Nina investigates the 911 call that led the police to Hank's house; Hank tries to get his life back on track; and, in the past, John's hesitancy to provide an alibi for missing time negatively impacts his relationship with Claire.
Adam and Hank both grapple with their newfound freedom; and, after meeting Adam, Hank wrestles with a dark secret he's kept for more than 10 years. Danny, meanwhile, inadvertently shares his doubts about Adam's identity with a reporter; Nina leads a team of detectives into the woods to find the area where Adam was held by a "pock-marked man"; and Claire asks Willa to persuade John to participate in her campaign.
In the premiere, Maine politician Claire Warren's presumed-dead son Adam returns home a decade after he disappeared; and while he's welcomed with a mixture of joy and astonishment, he's also met with suspicion, as some doubt that he is who he says he is. Adam's reappearance also reverberates beyond the family: the neighbor convicted of his murder must be freed.